added missing version number of lib "libmozjs-dev"

When compilating, an error occured - Unknown version of libmozjs-dev on Debian 7 Wheezy Stable.
Adding "185" before "-dev" solved the problem - compilation successfully work after this.
Merge branch 'patch-1' of https://github.com/Mettmett/cozy-setup

Conflicts:
	fabfile.py